Dear all drivers/GDI gurus,

I have already got comments from experts such as Tim and Vipin that I cannot
call into the original display card's DrvEnablePDEV from my dummy
DrvEnablePDEV in the MSDDK sample mirror driver. I just want to ask if this
is fundamentally not going to work?

Then what is the easiest way to modify the sample mirror driver to call the
original display card's DrvEnablePDEV? All I need is that GDIINFO
structure...

If the mirror driver cannot fundamentally not do that, what shall I do?

Here is my code in the enable.c inside the mirror\disp\ directory. As you
can see, I passed the parameters from GDI to the display card's
DrvEnablePDEV directly without any change(except that I created two local
structure: pDevInfo1, and pGdiInfo1, and passed to the display card's
DrvEnablePDEV, and hope the display card's DrvEnablePDEV will fill these two
structure upon returnning, then I copy these two structure back to return to
GDI).

The program successfully runs into the following command:

DISPDBG((0,"DISP Succeeded in locating DrvEnablePDEV in ati2dvag.dll%d\n",
pOldDrvEnablePDEV));

Then upon calling "ppdev=(PPDEV)((pOldDrvEnablePDEV)( ...)", it BSOD
UNEXPECTED_KERNEL_MODE_TRAP_M...

What might be the problem? Any thought? Your
comments/help/advice/suggestions/hints would be greatly appreciated!

Thank you so much!

-Lucy
----------------------------------------------------------------

DHPDEV DrvEnablePDEV(
DEVMODEW *pDevmode, // Pointer to DEVMODE
PWSTR pwszLogAddress, // Logical address
ULONG cPatterns, // number of patterns
HSURF *ahsurfPatterns, // return standard patterns
ULONG cjGdiInfo, // Length of memory pointed to by pGdiInfo
ULONG *pGdiInfo, // Pointer to GdiInfo structure
ULONG cjDevInfo, // Length of following PDEVINFO structure
DEVINFO *pDevInfo, // physical device information structure
HDEV hdev, // HDEV, used for callbacks
PWSTR pwszDeviceName, // DeviceName - not used
HANDLE hDriver) // Handle to base driver
{
GDIINFO * pGdiInfo1;
DEVINFO * pDevInfo1;
PPDEV ppdev = (PPDEV) NULL;
HANDLE hh;
OLDDRVENABLEDRIVER pOldDrvEnableDriver;
PFN pOldDrvEnablePDEV;
LPWSTR drivername=L"ati2dvag.dll";
LPSTR functionname1="DrvEnableDriver";
DRVENABLEDATA *pded;
ULONG i;

DISPDBG((0,"DrvEnablePDEV:\n"));

UNREFERENCED_PARAMETER(pwszLogAddress);
UNREFERENCED_PARAMETER(pwszDeviceName);


pGdiInfo1 = (GDIINFO *) EngAllocMem(FL_NONPAGED_MEMORY|FL_ZERO_MEMORY,
sizeof(GDIINFO), ALLOC_TAG);
if (pGdiInfo1 == (GDIINFO *) NULL)
{
RIP("DISP DrvEnablePDEV failed EngAllocMem for GDIINFO\n");
return((DHPDEV) 0);
}

pDevInfo1 = (DEVINFO *) EngAllocMem(FL_NONPAGED_MEMORY|FL_ZERO_MEMORY,
sizeof(DEVINFO), ALLOC_TAG);
if (pDevInfo1 == (DEVINFO *) NULL)
{
RIP("DISP DrvEnablePDEV failed EngAllocMem for DEVINFO\n");
return((DHPDEV) 0);
}


pded = (DRVENABLEDATA *) EngAllocMem(FL_NONPAGED_MEMORY|FL_ZERO_MEMORY,
sizeof(DEVINFO), ALLOC_TAG);
if (pded == (DRVENABLEDATA *) NULL)
{
RIP("DISP DrvEnablePDEV failed EngAllocMem for DRVENABLEDATA\n");
return((DHPDEV) 0);
}
// Allocate a physical device structure.
ppdev = (PPDEV) EngAllocMem(0, sizeof(PDEV), ALLOC_TAG);

if (ppdev == (PPDEV) NULL)
{
RIP("DISP DrvEnablePDEV failed EngAllocMem for PPDEV\n");
return((DHPDEV) 0);
}

memset(ppdev, 0, sizeof(PDEV));

// Save the screen handle in the PDEV.

ppdev->hDriver = hDriver;

// Get the current screen mode information. Set up device caps and
devinfo.

hh=EngLoadImage(drivername);
DISPDBG((0,"DISP Load old ati2dvag.dll %d\n", hh));

pOldDrvEnableDriver=(OLDDRVENABLEDRIVER)EngFindImageProcAddress(hh,
functionname1);
DISPDBG((0,"DISP Load DrvEnableDriver in old ati2dvag.dll %d\n",
pOldDrvEnableDriver));

if ((BOOL)(pOldDrvEnableDriver)(DDI_DRIVER_VERSION_NT5_01,
sizeof(DRVENABLEDATA), pded))
{
DISPDBG((0,"DISP Load DrvEnableDriver in old ati2dvag.dll
succeeded\n"));

pOldDrvEnablePDEV=NULL;
for (i=0; i<pded->c; i++)
if (pded->pdrvfn[i].iFunc==INDEX_DrvEnablePDEV)
{
pOldDrvEnablePDEV=pded->pdrvfn[i].pfn;
break;
}

if (pOldDrvEnablePDEV!=NULL)
{
DISPDBG((0,"DISP Succeeded in locating DrvEnablePDEV in
ati2dvag.dll%d\n", pOldDrvEnablePDEV));
ppdev=(PPDEV)((pOldDrvEnablePDEV)(pDevmode, // Pointer to
DEVMODE
pwszLogAddress, // Logical address
cPatterns, // number of patterns
ahsurfPatterns, // return standard patterns
sizeof(GDIINFO), // Length of memory pointed to by
pGdiInfo
(ULONG *)pGdiInfo1, // Pointer to GdiInfo structure
sizeof(DEVINFO), // Length of following PDEVINFO structure
pDevInfo1, // physical device information structure
hdev, // HDEV, used for callbacks
pwszDeviceName, // DeviceName - not used
hDriver)); // Handle to base driver

if (ppdev!=NULL)
{
DISPDBG((0,"DISP Calling Old DrvEnablePDEV Succeeded GDIINFO\n"));
DISPDBG((0, "Gamma=%d\n", pGdiInfo1->ulPhysicalPixelGamma));
}
else
DISPDBG((0,"DISP Calling Old DrvEnablePDEV Failed %d\n", ppdev));

}
else
DISPDBG((0,"DISP Failed in locating DrvEnablePDEV in
ati2dvag.dll\n", pOldDrvEnablePDEV));
}
else
DISPDBG((0,"DISP Load DrvEnableDriver in old ati2dvag.dll failed\n"));



//EngUnloadImage(hh);

-----------------------------------------------------------
Here is the clash dump:

1: kd> !analyze -v
****************************************************************************
***
*
*
* Bugcheck Analysis
*
*
*
****************************************************************************
***

UNEXPECTED_KERNEL_MODE_TRAP_M (1000007f)
This means a trap occurred in kernel mode, and it's a trap of a kind
that the kernel isn't allowed to have/catch (bound trap) or that
is always instant death (double fault). The first number in the
bugcheck parens is the number of the trap (8 = double fault, etc)
Consult an Intel x86 family manual to learn more about what these
traps are. Here is a *portion* of those codes:
If kv shows a taskGate
use .tss on the part before the colon, then kv.
Else if kv shows a trapframe
use .trap on that value
Else
.trap on the appropriate frame will show where the trap was taken
(on x86, this will be the ebp that goes with the procedure KiTrap)
Endif
kb will then show the corrected stack.
Arguments:
Arg1: 00000008, EXCEPTION_DOUBLE_FAULT
Arg2: f7727d70
Arg3: 00000000
Arg4: 00000000

Debugging Details:
------------------


BUGCHECK_STR: 0x7f_8

CUSTOMER_CRASH_COUNT: 5

DEFAULT_BUCKET_ID: COMMON_SYSTEM_FAULT

LAST_CONTROL_TRANSFER: from bac7edf9 to bac7edf1

STACK_TEXT:
WARNING: Stack unwind information not available. Following frames may be
wrong.
b82ba028 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df1
b82ba064 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82ba0a0 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82ba0dc bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82ba118 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82ba154 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82ba190 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82ba1cc bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82ba208 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82ba244 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82ba280 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82ba2bc bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82ba2f8 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82ba334 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82ba370 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82ba3ac bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82ba3e8 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82ba424 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82ba460 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82ba49c bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82ba4d8 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82ba514 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82ba550 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82ba58c bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82ba5c8 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82ba604 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82ba640 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82ba67c bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82ba6b8 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82ba6f4 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82ba730 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82ba76c bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82ba7a8 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82ba7e4 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82ba820 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82ba85c bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82ba898 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82ba8d4 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82ba910 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82ba94c bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82ba988 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82ba9c4 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82baa00 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82baa3c bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82baa78 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82baab4 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82baaf0 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82bab2c bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82bab68 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
b82baba4 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9


FOLLOWUP_IP:
siwvid+7df1
bac7edf1 ff7510 push dword ptr [ebp+0x10]

SYMBOL_STACK_INDEX: 0

FOLLOWUP_NAME: MachineOwner

SYMBOL_NAME: siwvid+7df1

MODULE_NAME: siwvid

IMAGE_NAME: siwvid.sys

DEBUG_FLR_IMAGE_TIMESTAMP: 3fd8b4b2

STACK_COMMAND: kb

BUCKET_ID: 0x7f_8_siwvid+7df1

Followup: MachineOwner
---------

simple:-
PDEV/SURFOBJ coming into the mirror driver is meant to be used by the mirror
driver and not by someother driver which won't be able to understand the
mirror driver's PDEV. Just build a dll(referring to permedia/mirror sample)
and then put in the directory of the real driver. Rename the dll to the real
driver's name and Rename the real driver dll to something like
realname-load.dll. Now do an EngLoadImage(...) from the filter dll and call
the right functions.

Thanks
vipin

"lucy" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Dear all drivers/GDI gurus,
>
> I have already got comments from experts such as Tim and Vipin that I
cannot
> call into the original display card's DrvEnablePDEV from my dummy
> DrvEnablePDEV in the MSDDK sample mirror driver. I just want to ask if
this
> is fundamentally not going to work?
>
> Then what is the easiest way to modify the sample mirror driver to call
the
> original display card's DrvEnablePDEV? All I need is that GDIINFO
> structure...
>
> If the mirror driver cannot fundamentally not do that, what shall I do?
>
> Here is my code in the enable.c inside the mirror\disp\ directory. As you
> can see, I passed the parameters from GDI to the display card's
> DrvEnablePDEV directly without any change(except that I created two local
> structure: pDevInfo1, and pGdiInfo1, and passed to the display card's
> DrvEnablePDEV, and hope the display card's DrvEnablePDEV will fill these
two
> structure upon returnning, then I copy these two structure back to return
to
> GDI).
>
> The program successfully runs into the following command:
>
> DISPDBG((0,"DISP Succeeded in locating DrvEnablePDEV in ati2dvag.dll%d\n",
> pOldDrvEnablePDEV));
>
> Then upon calling "ppdev=(PPDEV)((pOldDrvEnablePDEV)( ...)", it BSOD
> UNEXPECTED_KERNEL_MODE_TRAP_M...
>
> What might be the problem? Any thought? Your
> comments/help/advice/suggestions/hints would be greatly appreciated!
>
> Thank you so much!
>
> -Lucy
> ----------------------------------------------------------------
>
> DHPDEV DrvEnablePDEV(
> DEVMODEW *pDevmode, // Pointer to DEVMODE
> PWSTR pwszLogAddress, // Logical address
> ULONG cPatterns, // number of patterns
> HSURF *ahsurfPatterns, // return standard patterns
> ULONG cjGdiInfo, // Length of memory pointed to by pGdiInfo
> ULONG *pGdiInfo, // Pointer to GdiInfo structure
> ULONG cjDevInfo, // Length of following PDEVINFO structure
> DEVINFO *pDevInfo, // physical device information structure
> HDEV hdev, // HDEV, used for callbacks
> PWSTR pwszDeviceName, // DeviceName - not used
> HANDLE hDriver) // Handle to base driver
> {
> GDIINFO * pGdiInfo1;
> DEVINFO * pDevInfo1;
> PPDEV ppdev = (PPDEV) NULL;
> HANDLE hh;
> OLDDRVENABLEDRIVER pOldDrvEnableDriver;
> PFN pOldDrvEnablePDEV;
> LPWSTR drivername=L"ati2dvag.dll";
> LPSTR functionname1="DrvEnableDriver";
> DRVENABLEDATA *pded;
> ULONG i;
>
> DISPDBG((0,"DrvEnablePDEV:\n"));
>
> UNREFERENCED_PARAMETER(pwszLogAddress);
> UNREFERENCED_PARAMETER(pwszDeviceName);
>
>
> pGdiInfo1 = (GDIINFO *) EngAllocMem(FL_NONPAGED_MEMORY|FL_ZERO_MEMORY,
> sizeof(GDIINFO), ALLOC_TAG);
> if (pGdiInfo1 == (GDIINFO *) NULL)
> {
> RIP("DISP DrvEnablePDEV failed EngAllocMem for GDIINFO\n");
> return((DHPDEV) 0);
> }
>
> pDevInfo1 = (DEVINFO *) EngAllocMem(FL_NONPAGED_MEMORY|FL_ZERO_MEMORY,
> sizeof(DEVINFO), ALLOC_TAG);
> if (pDevInfo1 == (DEVINFO *) NULL)
> {
> RIP("DISP DrvEnablePDEV failed EngAllocMem for DEVINFO\n");
> return((DHPDEV) 0);
> }
>
>
> pded = (DRVENABLEDATA *)
EngAllocMem(FL_NONPAGED_MEMORY|FL_ZERO_MEMORY,
> sizeof(DEVINFO), ALLOC_TAG);
> if (pded == (DRVENABLEDATA *) NULL)
> {
> RIP("DISP DrvEnablePDEV failed EngAllocMem for DRVENABLEDATA\n");
> return((DHPDEV) 0);
> }
> // Allocate a physical device structure.
> ppdev = (PPDEV) EngAllocMem(0, sizeof(PDEV), ALLOC_TAG);
>
> if (ppdev == (PPDEV) NULL)
> {
> RIP("DISP DrvEnablePDEV failed EngAllocMem for PPDEV\n");
> return((DHPDEV) 0);
> }
>
> memset(ppdev, 0, sizeof(PDEV));
>
> // Save the screen handle in the PDEV.
>
> ppdev->hDriver = hDriver;
>
> // Get the current screen mode information. Set up device caps and
> devinfo.
>
> hh=EngLoadImage(drivername);
> DISPDBG((0,"DISP Load old ati2dvag.dll %d\n", hh));
>
> pOldDrvEnableDriver=(OLDDRVENABLEDRIVER)EngFindImageProcAddress(hh,
> functionname1);
> DISPDBG((0,"DISP Load DrvEnableDriver in old ati2dvag.dll %d\n",
> pOldDrvEnableDriver));
>
> if ((BOOL)(pOldDrvEnableDriver)(DDI_DRIVER_VERSION_NT5_01,
> sizeof(DRVENABLEDATA), pded))
> {
> DISPDBG((0,"DISP Load DrvEnableDriver in old ati2dvag.dll
> succeeded\n"));
>
> pOldDrvEnablePDEV=NULL;
> for (i=0; i<pded->c; i++)
> if (pded->pdrvfn[i].iFunc==INDEX_DrvEnablePDEV)
> {
> pOldDrvEnablePDEV=pded->pdrvfn[i].pfn;
> break;
> }
>
> if (pOldDrvEnablePDEV!=NULL)
> {
> DISPDBG((0,"DISP Succeeded in locating DrvEnablePDEV in
> ati2dvag.dll%d\n", pOldDrvEnablePDEV));
> ppdev=(PPDEV)((pOldDrvEnablePDEV)(pDevmode, // Pointer to
> DEVMODE
> pwszLogAddress, // Logical address
> cPatterns, // number of patterns
> ahsurfPatterns, // return standard patterns
> sizeof(GDIINFO), // Length of memory pointed to by
> pGdiInfo
> (ULONG *)pGdiInfo1, // Pointer to GdiInfo structure
> sizeof(DEVINFO), // Length of following PDEVINFO
structure
> pDevInfo1, // physical device information structure
> hdev, // HDEV, used for callbacks
> pwszDeviceName, // DeviceName - not used
> hDriver)); // Handle to base driver
>
> if (ppdev!=NULL)
> {
> DISPDBG((0,"DISP Calling Old DrvEnablePDEV Succeeded
GDIINFO\n"));
> DISPDBG((0, "Gamma=%d\n", pGdiInfo1->ulPhysicalPixelGamma));
> }
> else
> DISPDBG((0,"DISP Calling Old DrvEnablePDEV Failed %d\n", ppdev));
>
> }
> else
> DISPDBG((0,"DISP Failed in locating DrvEnablePDEV in
> ati2dvag.dll\n", pOldDrvEnablePDEV));
> }
> else
> DISPDBG((0,"DISP Load DrvEnableDriver in old ati2dvag.dll failed\n"));
>
>
>
> //EngUnloadImage(hh);
>
> -----------------------------------------------------------
> Here is the clash dump:
>
> 1: kd> !analyze -v
>
****************************************************************************
> ***
> *
> *
> * Bugcheck Analysis
> *
> *
> *
>
****************************************************************************
> ***
>
> UNEXPECTED_KERNEL_MODE_TRAP_M (1000007f)
> This means a trap occurred in kernel mode, and it's a trap of a kind
> that the kernel isn't allowed to have/catch (bound trap) or that
> is always instant death (double fault). The first number in the
> bugcheck parens is the number of the trap (8 = double fault, etc)
> Consult an Intel x86 family manual to learn more about what these
> traps are. Here is a *portion* of those codes:
> If kv shows a taskGate
> use .tss on the part before the colon, then kv.
> Else if kv shows a trapframe
> use .trap on that value
> Else
> .trap on the appropriate frame will show where the trap was taken
> (on x86, this will be the ebp that goes with the procedure KiTrap)
> Endif
> kb will then show the corrected stack.
> Arguments:
> Arg1: 00000008, EXCEPTION_DOUBLE_FAULT
> Arg2: f7727d70
> Arg3: 00000000
> Arg4: 00000000
>
> Debugging Details:
> ------------------
>
>
> BUGCHECK_STR: 0x7f_8
>
> CUSTOMER_CRASH_COUNT: 5
>
> DEFAULT_BUCKET_ID: COMMON_SYSTEM_FAULT
>
> LAST_CONTROL_TRANSFER: from bac7edf9 to bac7edf1
>
> STACK_TEXT:
> WARNING: Stack unwind information not available. Following frames may be
> wrong.
> b82ba028 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df1
> b82ba064 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82ba0a0 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82ba0dc bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82ba118 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82ba154 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82ba190 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82ba1cc bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82ba208 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82ba244 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82ba280 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82ba2bc bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82ba2f8 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82ba334 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82ba370 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82ba3ac bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82ba3e8 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82ba424 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82ba460 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82ba49c bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82ba4d8 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82ba514 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82ba550 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82ba58c bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82ba5c8 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82ba604 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82ba640 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82ba67c bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82ba6b8 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82ba6f4 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82ba730 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82ba76c bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82ba7a8 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82ba7e4 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82ba820 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82ba85c bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82ba898 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82ba8d4 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82ba910 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82ba94c bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82ba988 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82ba9c4 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82baa00 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82baa3c bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82baa78 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82baab4 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82baaf0 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82bab2c bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82bab68 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
> b82baba4 bac7edf9 00000000 e154c508 00000000 siwvid+0x7df9
>
>
> FOLLOWUP_IP:
> siwvid+7df1
> bac7edf1 ff7510 push dword ptr [ebp+0x10]
>
> SYMBOL_STACK_INDEX: 0
>
> FOLLOWUP_NAME: MachineOwner
>
> SYMBOL_NAME: siwvid+7df1
>
> MODULE_NAME: siwvid
>
> IMAGE_NAME: siwvid.sys
>
> DEBUG_FLR_IMAGE_TIMESTAMP: 3fd8b4b2
>
> STACK_COMMAND: kb
>
> BUCKET_ID: 0x7f_8_siwvid+7df1
>
> Followup: MachineOwner
> ---------
>
>
>

"vipin" <(E-Mail Removed)> wrote in message
news:e%23blv%(E-Mail Removed)...
> simple:-
> PDEV/SURFOBJ coming into the mirror driver is meant to be used by the
> mirror
> driver and not by someother driver which won't be able to understand the
> mirror driver's PDEV. Just build a dll(referring to permedia/mirror
> sample)
> and then put in the directory of the real driver. Rename the dll to the
> real
> driver's name and Rename the real driver dll to something like
> realname-load.dll. Now do an EngLoadImage(...) from the filter dll and
> call
> the right functions.
>
> Thanks
> vipin
>

Hi Vipin,

Thank you for your very great suggestions. But I have one question regarding
this approach. Is your idea the same as filter driver? A simple mirror which
only implements few DrvXXXXXX cannot pretend to be the real ATI driver,
because maybe the real ATI driver has many DrvXXXXXX functions and other
stranger functions which I don't know...

If the real ATI driver dll is "ati2dvag.dll", and I changed it to
"oldati2dvag.dll";

Then I pretend my mirror driver to be the real ATI driver, by changing the
name from "mirror.dll" to "ati2dvag.dll", ...

Then the system will regard the mirror driver as the real ATI's driver, so I
have to fullfill every functionality of the real ATI's driver, otherwise the
sytem will be screwed up... am I right?

In order to fulfill every functionality of the real ATI's driver, I need to
know all those functions from its DrvEnableDriver function and the returned
value of PDRVENABLEDATA structure... Then I need to write a wrapper function
for all of these functions, when the GDI calls me on these functions, I in
turn call the original real ATI driver. This is concept of filter driver...
am I right?

The problem is that I don't know how many such functions does the real ATI's
driver implement and expose, ... how do I write these functions before
compile time? And how do I know their calling conventions and argument
types? I also suspect that different display card, from ATI, or Nividia, has
different number of the DrvXXXXX functions implemented, so I have to write
wrapper functions for each of these cards one by one, and then compile the
filter drivers for these cards one by one... because they implements and
exports different set of DrvXXXXX functions... am I right?

The worst case is that if their DLL file has more functions than the
DrvXXXXXX functions which I don't know, and thus I don't have wrapper
function for these stranger functions, then by pretending I am the real ATI
driver, the system will be screwed up...

Any more thoughts? Thanks a lot for your help!

static DRVFN gadrvfn[] =
{
{ INDEX_DrvEnablePDEV, (PFN) DrvEnablePDEV },
{ INDEX_DrvCompletePDEV, (PFN) DrvCompletePDEV },
{ INDEX_DrvDisablePDEV, (PFN) DrvDisablePDEV },
{ INDEX_DrvEnableSurface, (PFN) DrvEnableSurface },
{ INDEX_DrvDisableSurface, (PFN) DrvDisableSurface },
{ INDEX_DrvAssertMode, (PFN) DrvAssertMode },
{ INDEX_DrvEscape, (PFN) DrvEscape },
{ INDEX_DrvCreateDeviceBitmap, (PFN) DrvCreateDeviceBitmap },
{ INDEX_DrvDeleteDeviceBitmap, (PFN) DrvDeleteDeviceBitmap },
{ INDEX_DrvTextOut, (PFN) DrvTextOut },
{ INDEX_DrvBitBlt, (PFN) DrvBitBlt },
{ INDEX_DrvCopyBits, (PFN) DrvCopyBits },
{ INDEX_DrvStrokePath, (PFN) DrvStrokePath },
};